Time to get rid of this money pit

[Coach]

After 4 years of frustration with this truck, I finally reached my breaking point this evening. It would take way too long to write all the crap that I have had to pay to have fixed on this truck, let's just say it is way more than I ever imagined it would be when I bought it. 3 months ago, I had the fuel pump replaced as well as the fuel sending unit. The truck drove great for 1 month. With the extreme summer heat out here, I parked it in the garage for 2 months.

I pulled it out of the garage, put the battery charger on it to fully charge the battery. Once done, I tried to start it the same way as always and it would crank, but not start. After 5 or 6 tries, it sputtered to a start. It would not idle smooth, started to sputter, gave it some throttle and it just died. Finally got it started again, let it idle and tried to go for a quick drive, huge mistake. If it has throttle, it drove OK (not like normal), as soon as I start to come to a stop sign or stop light, the RPMs drop almost to 0 and it starts to die. I had to keep putting it in neutral to get the RPMs to come up, then shift into drive and continue on. I limped it home this way.

Could it be a bad fuel pump again? If not, any ideas on the problem, so I can get it fixed and sell this money pit before the next thing goes wrong, thanks for any advice.